Electric water heater



. 1,645,277 Oct.l1,1927. Fm. CID I ELECTRIC WATER HEATER Filed Feb. 25, 1926 3 Sheets-Sheet' 1 X A invento ,izm'ad Jan 5221/.

' I By M Attorney 1 645 "277 Oct. 1' F. J 9 I ELECTRIC WATER HEATER Filed Feb. 25, 1926 $.Sheets-Sheet2 Inventor N ,Z'aaatl Jean (lad I Attorney 3 Sheets-Sheet 3 ii F. J. CID

Filed Feb. 25, 1926 ELECTRIC WATER HEATER Inventol Q j"ouai clan Cid.

Attorney ing drawings in which Patented Oct. 11, 1927.

1 UNITED STATES FOUAD JEAN on), or INDIANAPOLIS, INDIANA.

ELECTRIC WATER HEATER.

Application filed February The present invention pertains to novel improvements vin electric heaters, and the principalobject isthe provision of a device of-this character constructedof a small nunrberof simple andinexpensive parts and also eflicientand reliable in operation. The device consists essentially of :a ,metallic casing having one or more water spaces formed therein. When two chambers are used, the water which is receivedfrom a suitable supply is caused to flow nto the upper'end' of one of the spaces, then to the lower end of the remaining space, and finally through an outlet pipe leadlng from. the upperend of the latter space .to the lower part of the casing. "Each-chamber preferably contamsa car- 'bon rod around whichis wound a splral resistance element embodied in a acket of lava.- This rodhas been found n practice to become redhot during operatlon of the device and's'omaintain it at a constant uniform temperature. 1 p u The invention is fully disclosed 111 the following description and .in. the accompanyl Figure 1 is an elevation of a device con- "structed according to the invention; a

-Fi'gure 2 is a vertical; sectlon on the line 2 2-o f'Figure 1-;":- r' I Figure is a vertical, sectlon at rlght angles to Figure 2*a1id on the hue 3-3 of Figure2; w D I FigurejL 1s a transverse .llOI'lZOIlt-Ell section on the li'ne 4. 4 0i igure- 3 1 u Figure 5 is a similarsection on 5--5 of Figure 3; I i r Figure fi is airelevat-ion ofa modified form, partly in section;; z

' Figure 7 is a: detail section of the switch actuating device employed In Figure 6 and FigureS is a detall elevation of the switch device. 1 l '1 Reference to these views will now be made by: use of like characters which are employed towdesignate' corresponding. parts the line tliroughout. r I I. The apparatus illustrated'in Figures :1 to 5" inclusive comprises 1 an outercasing 1 of substantially oval shape surmounted by a tl'ome2: The vertical'wall' of the casing is provided with a heat insulating lining 3 to prevent the es cape of heat through the casing" i- Within the casing'is' 'mounted a core 4:

V COI'E.

communicates with the water space 5.

25, 1926. Serial No. 90,651.

having the form of two cylinders connected by alcomparatively small bridge' The core is spaced all around from the inner surface of the lining 3 and thereby forms a water chamber 5 surrounding the entire The two cylinders comprised in the core contain separate units of the heating, apparatus and are designated as A and B. Since'both units are of identical constructionexcept for details which are fully pointed out below, a description of one such unit will suffice.

Each unit has a cylindrical longitudinal opening drilled or cast therein, and this opening. contains a carbon rod 6 of such size as to form an annular space with the inner wall of the unit. The rod is surrounded by a jacket 7 of lava, and in the latter is cut a spiral groove 8. which receives a spirally Wound resistance element 9. The

resistance elements in the two units are connected in series, preferably by forming both windings of a single continuous ribbon. The resistance element is surrounded by a mica insulating sleeve 10 which engages the ribs 8. constituting the walls of the groove 8. Finally, the sleeve is surrounded by a metal tube 11, and the 'sleeves'of the two units form annular water spaces 12 and 12 with theinner walls of the cylindrical openings in which they are placed.

. To the lower end of the casing 1 is secured a block 13 which carries a bracket 15 by means of which the entire device may be.

supported on a wall16 or the like. In the block. 13, is cut a Water passage 17 which A pipe 18leading from a source of water supply is connected to the passage 17 as clearly.

illustrated in Figure 1'.

The upper end of the core 4 is formed with a water admission duct 19. in the wall of unit A so that the water chamberv 5 is brought into communication with the annular water space 12; I The bridge l of the core A hasa duct 20 formed in its base to establishcommunication between the Water spaces 12 and 12 at their lower'ends. The space'12 is connected at its upper end to an outlet pipe 21 which passes through the chamber 5 andcommunicates with an outlet cock 22threaded into the'casing as clearly shown in Figure 3.

Over the units A and B and at the base of the dome 2 is mounted a cover plate 23 Ind of insulating material as clearly illustrated in Figures 2 and 3. The ends of the resistance elements 9 are connected to binding posts 24 passed through the plate 23. A pair of conductors 25 leading from a source of electrical energy are connected to the binding posts, whereby a circuit is completed for the supply of current to the resistance element. In the operation of the device as thus far described, the water entering the lower end of the chamber through the passage 17 is forced to rise until it flows through the duct 19 into the annular water space 12 of unit A. on reaching the bottom of this space, the water flows through the duct 20 and to the bottom of the annular Water space 12 of unit B. The water rises to the top of the latter space and then down through the pipe 21 to the outlet cock 22. In its passage down the space 12 and up the space 12, the water is heated by its contact with the metal sleeves 11 which in turn are heated by the resistance elements 9. I

In the embodiment illustrated in Figure 6, the casing 51 also has an'extension 52 in which the switch device is mounted. The switch mechanism consists however in this caseof an apparatus controlled by the pressure of the entering water. The conductors leading to the ends of the resistance ele-f merits are provided with spaced contacts 53. To the water inlet pipe 55 is connected a cup 56 into which is threaded a cylinder 57 open at both ends. The cylinder contains a hollow piston 58 adapted to receive water from the cup 56. The cylinder is surrounded by a'sleev'e 59 carrying at its other end a cap 60 which lies over the top of the cylinder 5?. In the "annular space formed by the cylinder and sleeve are mounted a plurality of springs 61 which engage a flange 62 at the lower end of the sleeve and a flange 63 at the upper endof the cylinder. To the cap 60 is attached an upright rod 64 having a fork-65 extending perpendicularly therefrom. An

arm 66is connected to the switch blades and carries a pulley 67 which is slidable within the fork 65. Theadmissionpipe 55 is controllable by a valve 68 inserted therein'at an exterior point as shown in Figure 8. When this valve is opened, water is admitted to the cup 56, and. the piston 58 is raised by water pressure. This movement is transmitted to the blades 54: through the mechanism 6467, and the circuit through the conductors is completed. When the water within the apparatus has been heated to the desired temperature, the valve handle 48 is turned to admit a flow of water through the n'ozzle46.

While specific embodiments of the. invention have been illustrated and described, it is to be understood that various alterations in the details of construction may be made Having thus fully described the invention, what I claim as new and desire as protect by Letters Patent is:

1. An electric heater; comprising a casing, a core contained in th'e'casing and having a pair of water spaces formed therein, refractory tubes disposed in said spaces, resistance elements wound around said tubes fluid inlet means extending to one of said spaces, fluid outlet means extending train the remaining space, said core being formed with a duct connecting the two waterspa'es;

. 2. An electric heater comprising'a using,

a core contained in the casing having irpaii' from the water spaces, fluid inlet meansextending to one vof-said spaces, fluid outlet means extending from the remaining space, said core being formed with "a duct connect- 7 ing the two water spaces. p

4. An electric heatercomprising,greasing,

a pair of resistance elemeiitsmounted with-in said casing and each comprising a refractory tube, a resistance conductor wound, onzsaid tube, an insulating cover snrrbundilngjsaid resistance conductor and a metal-lictiibulgr protecting casing surrounding sea-issuaning cover and closed atits opposite against the ingress of liquid,;antl,a of water jackets surrounding each off's'aid resistance elements. an'din "spaced relation thereto, one'of said jackets having a Pater inlet at one end thereof, the where: jackets having a. water outlet at the eorresponding end and the oppositee'nds if-both of said jackets being in liquid cbminuni'cation with one another.

5; An electric heatercomprising-a resist ance element including a cylindrical skippoftt of refractory material, a"resistance cbntl'um tor wound upon said suppornhn insulating covering surroundingand enclosing saidri eslstance conductor and a tubular reteens jacket surrounding "resistance eieiii'ent and closed at both ends against "the of liquid, :a water jacket ;3urroiii1i1ing ismd protector and in spaced relatiofitherleto having an inlet for the watervat onb thereof and an outlet therefor. atthe end thereof and a second water jacket stirrounding v:said first I mentioned f'water ji cket and in spaced relation "thereto.

6. An electric heater comprising a resist-' ance element, a tubular insulating covering surrounding said resistance element, a tubular protective casing surrounding said insulating tube and closed at both ends against liquid ingress, a Water jacket surrounding said protective casing and spaced apart therefrom and having a Water inlet at one end and a water outlet at the other end and a second Water jacket surrounding said first mentioned water jacket in spaced relation thereto and having an inlet and an outlet therein, said outlet of the second mentioned jacket communicating with the outlet of said first mentioned jacket.

7. An electric heater comprising a resistance unit, a tubular insulating covering surrounding said resistance unit, a tubular protective casing surrounding said cover and closed at each end against ingress of-liquid, a water jacket surrounding said protective casing and in spaced relation thereto, an inlet at one end of said water jacket and an outlet at the other end of said jacket, a second Water jacket surrounding said first mentioned water jacket and in spaced relation thereto having an inlet at an end opposite the inletof said first mentioned water jacket and having an outlet communicating with the outlet of said first mentioned water jacket.

8. An electric heater comprising a pair of resistance elements, a tubularinsulating covering surrounding each of said elements, a second tubular enclosing casing surrounding said insulating covering and closed at each end against the ingress of water, a Water jacket surrounding each of said protective casings and in spaced relation thereto, one of said water jackets having an inlet at one end and the other having an outlet at the corresponding end and said jackets communicating With one another at the opposite ends and a Water jacket surrounding both of said first mentioned water jackets and having an inlet at one end and an outlet communicating with the outlet in the Water jacket.

9. An electric water heater comprising a pair of heating units each including a tubular support of refractory material, a resist ance conductor wound upon said support, a tubular insulating casing surrounding said conductor and a tubular protective casing surrounding said insulating casing and closed at both ends against the ingress of liquid, a water jacket surrounding each of said heating units and in spaced relation to said protective casings, said Water jackets communicating with one another and a second Water acket surrounding at least a part of both of said first mentioned jackets and communicating therewith.

, In Witness whereof I have hereunto set my a hand.

FOUAD JEAN CID. 

